Lathe-center



E. M. HOOVER.

LATHE CENTER.

APPLICATION FILED SEPT. 10, 19H. 1,338, 15 1 atented Apr- 27, 1920.

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made a part of this application,

UNITED strarns PATENT OFFICE.

EDWARD M. HOOVER, OF ANDERSON, INDIANA, ASSIGNOR TO THE HOOVER-MANU-FACTURING COMPANY, OF ANDERSON, INDIANA, A CORPORATION.

LATHE-CENTER.

Application filed September 10, 1917.

To all whom it may concern Be it known that I, EDWARD M. HOOVER, acitizen of the United States, and a resident of Anderson, county ofMadison, and State of Indiana, have invented a certain new and usefulLathe-Center; and I do hereby declare that the following is a full,clear, and exact description thereof, reference bein had to theaccompanying drawings, in whic 1 like letters refer to like parts.

My invention relates to new and useful improvements, in lathe-centersfor lathes, grinders or similar devices, and my object is to provide aremovable centering point for use in connection with the lathe center.

A further object is to provide said removable point with a taperedportion for engagement with a tapered seat in the'lathe center.

A further object is to provide an opening longitudinally of the lathecenter, whereby an instrument may be introduced for disen-- gaging thecentering point from the lathe center.

Other objects and advantages will be hereinafter more fully set forthand pointed out in the accompanying specification.

In the accompanying drawings which are l igure 1 is a side elevation ofthe lathe center with the removable point attached thereto. Fi 2 is asectional view as seen on line 22 0 Fig. 1. Fig. 3 is a frontend'elevation of the lathe center with the centering point removedtherefrom. Fig. 4 is a perspective view of the centering point removedfrom the centering tool. Fig. 5 is a View of the rod for removing thecentering point from the lathe center.

Referring to the drawings in which similar reference numerals designatecorresponding parts throughout the several views, 1 indicates the lathecenter which is preferably tapered from end to end, the forward.

or outer end of the center having a beveled face 2. Extendinglongitudinally of the lathe center 1 is a bore 3 which terminates at itsforward end in an enlarged seat 4, the the walls of said seat beingtapered to receive the tapered end 5 of a centering point, or pin 6, theprojecting end 7 of the center- Speciflcation of Letters Patent.

- or worn any suitable Patented Apr. 2'7, 1920. Serial No. 190,549. I

it is necessary to grind the beveled end thereof at intervals in orderto keep the point roperly sharpened for engag ment with tie work, which,in time, comp etely destroys the lathe center, while in the presentinstance the lathe center itself is never "ground or otherwise treated,from. the fact that when the centering point becomes blunt or worn it isremoved and either sharpened or replaced by a new point, thus greatl'reducing the expense of maintenance. l' t will also be seen that bytapering the centering point, as well as the walls of the lathe center,said point will be locked against rotation when properly engaged withthe seat in the lathe center.

When the centerin point has become dull form of instrument such as aplunger or bar 8, is introduced through the bore 3 and forced intoengagement with the end of the centering point 6,,

thus releasing the. centering point from the seat so it may be readilyground or replaced by a new point. The conical end 7 of the centeringpoint and the beveled end 2 of the lathe center are so shaped that thework engaged by the centering point 'will never come in contact with theend of the lathe center, thus preventing wear on any part of the lathecenter.

2. A centering device for lathes, grind- 100 ers or like tools,comprising a tool havin an inwardly tapering seat at the forwar endof-the lathe center, and a centering said seat upon application of saidtool, the point having one portion thereof tapering said toolbeingprovided with means whererearw'ardly or engagement with the rearbythe centermg point may be forcibly re- 10 wardly taperin seat ofthe saidtool, and moved therefrom.

'5 the opposite en thereof conical for engage- In witness whereof I havehereunto affixed ment with an object whereby said centering mysignature. point will become wedged and secured in EDWARD M. HOOVER.

